Hammerhead



FIG. 1 is a perspective view of a hammerhead, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in FIG. 7 illustrate a portion of the hammerhead thatforms no part of the claimed design.

The ornamental design for a hammerhead, as shown and described.